CN100487785C - Electro-optical device, driving method therefor, and electronic apparatus - Google Patents
Electro-optical device, driving method therefor, and electronic apparatus Download PDFInfo
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- CN100487785C CN100487785C CNB2006101418706A CN200610141870A CN100487785C CN 100487785 C CN100487785 C CN 100487785C CN B2006101418706 A CNB2006101418706 A CN B2006101418706A CN 200610141870 A CN200610141870 A CN 200610141870A CN 100487785 C CN100487785 C CN 100487785C
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
- G09G2310/0248—Precharge or discharge of column electrodes before or after applying exact column voltages
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
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- Chemical & Material Sciences (AREA)
- Computer Hardware Design (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
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Abstract
A voltage structure which pre-charges the data line and switches the common electrode between a lower voltage and a higher voltage is disclosed to abate the switch element property of the pixels. A common electrode alternately switches the higher voltage (ComH) and the lower voltage (Coml) in a horizontal scanning interval (1H). Besides, the scanning line within a predetermined order is selected to apply the selection voltage to each of the selected scanning lines. The data line (d1a) is provided with a data signal of the voltage corresponding to the grayscale levels of the pixels during the period of applying a selecting voltage to the scanning line and the period of maintaining the common electrode at a fixed interval b and d, and the data line is precharged to a predetermined potential in a period of time including a period when the voltage is applied to the common electrode changing from one side of the ComH or ComL to the other.
Description
Technical field
The technology of simplification of the structure of the electro-optical device that the present invention relates to realize that liquid crystal indicator is such etc.
Background technology
The utilize electric light such at liquid crystal indicator changes in the electro-optical device that shows, usually, pixel was provided with accordingly with sweep trace (grid line) and intersecting of data line (source line), each pixel comprise by pixel electrode and decide current potential public electrode holding liquid crystal and so on electro-optical substance electric capacity and when sweep trace is selected, between data line and pixel electrode, become the on-off element of conducting state, and each pixel becomes and the corresponding gray shade scale (lightness) of voltage effective value by electric capacity kept.At this, in using the structure of liquid crystal as electro-optical substance, because the AC driving with pixel is a principle, so data-signal, high position (positive polarity) at the relative datum current potential is held the scope that reaches from the highest gray shade scale to minimum gray shade scale, holds the scope that reaches from the highest gray shade scale to minimum gray shade scale at the low level (negative polarity) of relative said reference current potential.
For this reason, thus propose to have by in per 1 horizontal scan period for example with the narrow technology (for example, referring to patent documentation 1) of simplification of circuit of voltage range realization driving data lines of data-signal of high-order voltage and low level alternating voltage ground switching public electrode.
[patent documentation 1] spy opens clear 62-49399 communique
But, in this technology,, also produced the on-off element that has pixel, the sweep trace circuit of driven sweep line needs the such problem of situation of the voltage range of broad on the contrary though realized the simplification of the circuit of driving data lines.
Summary of the invention
The present invention is exactly in view of the above problems and realizes, purpose is to provide a kind of electro-optical device, its driving method and electronic equipment of needed voltage ranges such as circuit of on-off element, driven sweep line of the pixel that narrows in the technology with high-order voltage and low level alternating voltage ground switching public electrode.
In order to achieve the above object, electro-optical device of the present invention, be to have to comprise and being provided with accordingly with intersecting of multi-strip scanning line and many data lines and for the independent pixel electrode of each pixel, the public electrode relative with pixel electrodes, and between above-mentioned data line and the pixel electrodes and above-mentioned sweep trace is being applied the pixel that becomes the on-off element of conducting state when selecting voltage, and for above-mentioned public electrode, switch and apply the high-order voltage of assigned voltage and the electro-optical device of comparing relatively low low level voltage with above-mentioned high-order voltage with the predetermined cycle, it is characterized in that, possess: scan line drive circuit, it is with above-mentioned multi-strip scanning line of select progressively of regulation, and selected sweep trace applied above-mentioned selection voltage; And data line drive circuit, its voltage during selecteed, that above-mentioned public electrode is applied as above-mentioned sweep trace be retained as above-mentioned high-order voltage or above-mentioned low level voltage during, provide the data-signal corresponding to above-mentioned data line with the gray shade scale of pixel, and comprise the side of above-mentioned public electrode from above-mentioned high-order voltage and above-mentioned low level voltage change to the opposing party during during in, above-mentioned many data lines are precharged to the current potential of regulation.If employing the present invention then can make the on-off element for pixel, the desired characteristics such as circuit of driven sweep line relax to some extent.
In the present invention, also can form such structure: above-mentioned precharge from the outset when finishing during, be included in the side of above-mentioned public electrode from above-mentioned high-order voltage or above-mentioned low level voltage change to the opposing party during in; Also can form such structure: during above-mentioned precharge beginning, be included in the side of above-mentioned public electrode from above-mentioned high-order voltage or above-mentioned low level voltage change to the opposing party during in, during above-mentioned precharge end, be included in above-mentioned public electrode be fixed on the opposing party in above-mentioned high-order voltage or the above-mentioned low level voltage during in; Also can form such structure: during above-mentioned precharge beginning, be included in above-mentioned public electrode be fixed on a side in above-mentioned high-order voltage or the above-mentioned low level voltage during in, during above-mentioned precharge end, be included in the side of above-mentioned public electrode from above-mentioned high-order voltage or above-mentioned low level voltage change to the opposing party during in.
In addition, in the present invention, also can form such structure: above-mentioned precharge from the outset when finishing during, be included in to above-mentioned sweep trace apply above-mentioned selection voltage during in.
In addition, the present invention not only can form electro-optical device, but also can form method of driving electro-optical device and then comprise the electronic equipment of above-mentioned electro-optical device.
Description of drawings
Fig. 1 is the block diagram of structure that the electro-optical device of the embodiment of the invention is shown;
Fig. 2 is the figure that the structure of the pixel in this electro-optical device is shown;
Fig. 3 is the figure that the structure of the data-signal supply circuit in this electro-optical device is shown;
Fig. 4 is the figure that sweep signal in this electro-optical device etc. is shown;
Fig. 5 is the figure that the voltage waveform of the each several part in this electro-optical device is shown;
Fig. 6 is the figure that the voltage waveform of the each several part in this electro-optical device is shown;
Fig. 7 is the figure that the voltage waveform of each several part in the comparative example is shown;
Fig. 8 is the figure that sweep signal, data-signal etc. in the variation are shown;
Fig. 9 is the figure that sweep signal, data-signal etc. in the variation are shown;
Figure 10 is the figure of structure of mobile phone that the electro-optical device of Application Example is shown; And
Figure 11 is the figure of structure of projector that the electro-optical device of Application Example is shown.
Label declaration
10: electro-optical device; 20: control circuit; 100: the viewing area; 105: liquid crystal; 108: public electrode; 110: pixel; 112: sweep trace; 114: data line; 116:TFT; 118: pixel electrode; 120: liquid crystal capacitance; 130: scan line drive circuit; 140: data line drive circuit; 1200: mobile phone; 2100: projector.
Embodiment
Below, with reference to accompanying drawing embodiments of the invention are described.Fig. 1 is the block diagram of structure that the electro-optical device of the embodiment of the invention is shown.
As shown in the drawing, electro-optical device 10 comprises control circuit 20, viewing area 100, scan line drive circuit 130 and data line drive circuit 140.Wherein, in the viewing area 100, the mode of extending with (X) direction of being expert at is provided with 10 horizontal scanning lines 112 respectively, on the other hand, is provided with 15 column data lines 114 in the mode of extending in row (Y) direction.
At this, the structure of pixel 110 is described.Fig. 2 is the figure that the electricity structure of pixel 110 is shown.The figure shows 2 * 2 structures of totally four pixels, intersecting that this (i-1) that four pixels are capable with i, lastrow is adjacent with it row and j row, (j-1) that the first from left row are adjacent with it are listed as is corresponding.
In addition, (i-1), i, be the symbol under the situation of the row that is arranged in of remarked pixel 110 prevailingly, be smaller or equal to 10 integer more than or equal to 1, (j-1), j is the symbol under the situation of the row that are arranged in of remarked pixel 110 prevailingly, is more than or equal to 15 integer smaller or equal to 1.
As shown in Figure 2, each pixel 110 has as on-off element and plays a role and thin film transistor (TFT) (Thin Film Transistor is designated hereinafter simply as " TFT ") 116 and the liquid crystal capacitance 120 of n channel-type.
At this, for each pixel 110, owing to be mutual identical structure, if so be that representative describes with the pixel that is positioned at the capable j of i row, then the grid of the TFT116 of the capable j row of this i pixel 110 are connected to i horizontal scanning line 112, on the other hand, its source is connected to j column data line 114, and it is pixel electrode 118 that its leakage is linked to liquid crystal capacitance 120 1 ends.
In addition, the other end of liquid crystal capacitance 120 is public electrodes 108.This public electrode 108 is public for all pixels 110, and it is supplied to signal LCcom described later.
Thereby in the present embodiment, liquid crystal capacitance 120 constitutes across liquid crystal 105 and public electrode 108 are relative by pixel electrode 118.
In addition, because pixel electrode 118 not only, and also for the data line 114 of each row, also relative with public electrode 108 across liquid crystal 105, therefore, shown in the dotted line of Fig. 2, produced a kind of capacitor parasitics C.
In addition, each opposite face at two substrates is provided with alignment films respectively, this alignment films is carried out milled processed in the long axis direction mode that for example about 90 degree are reversed continuously between two substrates of liquid crystal molecule, on the other hand, each rear side at two substrates is provided with the polariscope corresponding with direction of orientation respectively.
If the voltage effective value that is kept by liquid crystal capacitance 120 is zero, then carry out about 90 degree optics rotations along reversing of liquid crystal molecule by the light between pixel electrode 118 and the public electrode 108, on the other hand, along with this voltage effective value becomes big, liquid crystal molecule tilts to direction of an electric field, as a result, this optics rotatory disappears.For this reason, under the situation of for example infiltration type, in light incident side and rear side, respectively so that the polarization axle mode consistent when disposing polariscope with direction of orientation, if this voltage effective value approaches zero, then the transmitance of light becomes maximum, shows thereby become white, on the other hand, along with voltage effective value becomes big, the light quantity that sees through reduces, and final transmitance becomes minimum, thereby becomes black display (normal white mode).
Therefore, by being applied, sweep trace select voltage to make the TFT116 conducting, and pixel electrode 118, TFT116 by data line 114 and conducting state are applied such voltage, promptly this voltage be with respect to public electrode 108 voltage, high or low one with as the high position (positive polarity) of the corresponding voltage of the gray shade scale (lightness) of target or the voltage of low level (negative polarity), make it possible in this liquid crystal capacitance 120 voltage effective value that keeps corresponding with gray shade scale.
In addition, when sweep trace 112 became non-selection voltage, TFT116 became shutoff (non-conduction) state, still, because the pass resistance break of this moment is not to become infinity ideally, so electric charge leaks a lot from liquid crystal capacitance 120.In order to reduce the influence that this shutoff is leaked, in each pixel, be formed with memory capacitance 125.One end of this memory capacitance 125 links to each other with pixel electrode 118 (leakage of TFT116), and the other end is public for all pixels, is electrically connected with public electrode 108.
Turn back to Fig. 1 and describe, control circuit 20 has for scan line drive circuit 130 to be made its vertical scanning viewing area 100 and makes first function of its horizontal scanning viewing area 100, the 3rd function of the signal LCcom that alternately switches low level side voltage and high-order side voltage is provided in second function of the selection of described later of this horizontal scanning time control, to public electrode 108 for data line drive circuit 140.
Wherein, about first function, control circuit 20 and synchronously generates and exports the control signal CtrY that is used for vertical scanning viewing area 100 and be used for the control signal CtrX of horizontal scanning viewing area 100 from the view data Ds that omits illustrated outside epigyny device and provide.At this, view data Ds is meant the numerical data of the lightness (gray shade scale) of fixation element 110, and it is provided by the order of outside epigyny device according to the arrangement of and the vertical 10 row * horizontal strokes of horizontal scanning 15 row vertical in a vertical scanning period (1F).
Then, about second function, control circuit 20, when carrying out horizontal scanning according to control signal CtrX, output is used for selecting successively piece and is used for 15 column data lines 114 are carried out precharge signal S1, S2, S3.
In addition, in control signal CtrX, comprise the signal Pol that write polarity of appointment for liquid crystal capacitance 120.At length, this signal Pol, for example if the H level, then indicating pixel electrode 118 to become high-order positive polarity with respect to public electrode 108 writes, if the L level then indicates pixel electrode 118 to write with respect to the negative polarity that public electrode 108 becomes low level, as shown in Figure 4, it is in a certain vertical scanning period (1F), and (1H) becomes level inversion for each horizontal scan period.Therefore, in the present embodiment, for liquid crystal capacitance 120 write polarity become for each sweep trace anti-phase, be referred to as the row anti-phase.In addition, this signal Pol between two adjacent mutually vertical scanning period, at same horizontal scan period (1H) time, becomes the relation of level inversion mutually.Therefore, in the present embodiment, at same liquid crystal capacitance 120 time, writing polarity becomes anti-phase for each vertical scanning period (1F).In addition, making the polarity that writes of liquid crystal capacitance 120 become anti-phase purpose, is the deterioration for the liquid crystal 105 that prevents to cause owing to applying of flip-flop.
Then, the 3rd function is elaborated.As shown in Figure 5, control circuit 20 is controlled in following mode, promptly, one horizontal scan period (1H) of specifying positive polarity to write in that signal Pol is set at the H level, make public electrode 108 when beginning be with it starting point during be reduced to voltage ComL from voltage ComH in a, during the b internal fixation at voltage ComL, on the other hand, one horizontal scan period (1H) of specifying negative polarity to write in that signal Pol is set at the L level, make public electrode 108 when beginning be with it starting point during rise to voltage ComH from voltage ComL in the c, during the d internal fixation at voltage ComH.In addition, in the present embodiment, it is the symmetrical position relation of benchmark that voltage ComL and ComH have with half the voltage Vc that is equivalent to supply voltage Vdd, wherein, voltage ComL is equivalent to half of voltage Vc, and voltage ComH is equivalent to the intermediate value of supply voltage Vdd and voltage Vc.
At this, in the present embodiment, comprise two kinds of situations, promptly have resistance and formed stray capacitance C owing to public electrode 108, thus when applying desirable square wave (with reference to Fig. 4), the result, as shown in Figure 5, the situation of the voltage generation passivation of public electrode 108; And as desirable state, with the waveform of signal Lccom during become the mode of ramp waveform in a, the c, the situation of passivation takes place in public electrode 108 on one's own initiative.In a word, in the present embodiment, public electrode 108, be not in the mode switched from direction the opposing party of voltage ComL, ComH instantaneously but with during the mode that little by little changes a, the c constitute.
In the present embodiment, control circuit 20 becomes in this period and among a, the c signal S1, S2, S3 side by side is made as the H level and as described later all data lines 114 is carried out precharge structure.
In addition, in Fig. 4 and Fig. 5, for convenience's sake, for sweep signal G1, the G2...G10 that can handle as logical signal, signal S1 etc. and voltage waveform in addition, make longitudinally voltage ratio (ス ケ-Le) different (in Fig. 6 to Fig. 9 described later too).
Scan line drive circuit 130, according to control signal CtrY, vertical scanning the 1st, 2,3...10 horizontal scanning line 112, and sweep signal G1, G2, the G3...G10 corresponding with this vertical scanning is provided.At length, as shown in Figure 4, scan line drive circuit 130, at a vertical scanning period (1F), select the 1st, 2 respectively successively in each horizontal scan period (1H), 3...10 horizontal scanning line 112, and in during narrower, being set to be equivalent to the selection voltage Vdd of H level corresponding to the sweep signal of selected sweep trace 112 than this horizontal scan period (1H), the sweep signal of sweep trace 112 in addition is set to be equivalent to the non-selection voltage Vss of L level.In addition, this non-selection voltage Vss is actually the earthing potential Gnd (no-voltage) of voltage reference.
In addition, in the present embodiment, as shown in Figure 5, sweep signal G1, G2, G3...G10 become the timing of H level, during a, c, being set in sweep signal S1, S2, S3 side by side becomes before the H level.
Data line drive circuit 140 comprises data-signal supply circuit 142 and is arranged on the switch 144 of an end of each data line 114.At this, the structure of data-signal supply circuit 142 is described with reference to Fig. 3.As shown in the drawing, data-signal supply circuit 142 comprises divider 180, latch cicuit 182,184, selector switch 186, D/A converter 188 and buffering circuit 189.
Wherein, divider 180 is distributed to the latch cicuit 182 corresponding with each row with the view data Ds of pixel delegation.The latch cicuit 182 corresponding with each row latchs the view data Ds that distributes separately, in the present embodiment, per 5 row is divided into a piece.At length, in the present embodiment, because the columns of data line 114 is 15, so latch cicuit 182 is classified as 3 piece Ba, Bb, Bc.Wherein, piece Ba by with Fig. 1 in begin the corresponding latch cicuit 182 of several the 1st, 4,7,10,13 column data lines 114 from a left side and constitute, piece Bb is made of the latch cicuit 182 corresponding with the 2nd, 5,8,11,14 column data lines 114, and piece Bc is made of the latch cicuit 182 corresponding with the 3rd, 6,9,12,15 column data lines 114.
On the other hand, latch cicuit 184 continues to latch regulation by the data of omitting the pre-charge voltage that illustrated control circuit provides after power connection, till dump.In the present embodiment, these data are equivalent to for example specify the view data of the darkest gray shade scale under normal white mode.
But, all being at signal S1, S2, S3 under the situation of H level, selector switch 186 is selected latch cicuit 184, and 5 row jointly distribute output by these latch cicuit 184 latched data.
D/A converter 188 is provided with 5 row accordingly with the output of selector switch 186, if and signal Pol specifies positive polarity, then each D/A converter 188 will be converted to such aanalogvoltage from the view data Ds of these selector switch 186 outputs, promptly this aanalogvoltage be than voltage ComL high one with aanalogvoltage by the high position of the corresponding voltage of the gray shade scale of this view data Ds appointment, if signal Pol specifies negative polarity, then be converted to such aanalogvoltage, promptly this aanalogvoltage be than voltage ComH low one with aanalogvoltage by the low level of the corresponding voltage of the gray shade scale of this view data Ds appointment.
On the other hand, as shown in Figure 1, be connected with an end of switch 144 respectively with each column data line 114.The other end of switch 144 begins the public connection of per 3 row of number from a left side.In the present embodiment, because columns is 15, so the points of common connection of the other end of switch 144 is 5.In addition, for these tie points, begin to provide respectively data-signal d1, d2, d3, d4, the d5 that supplies with by data-signal supply circuit 142 from a left side.In addition, in the switch 144, when signal S1 becomes the H level, with the corresponding switch conduction of the 1st, 4,7,10,13 row, similarly, when signal S2 becomes the H level, with the corresponding switch conduction of the 2nd, 5,8,11,14 row, when signal S3 becomes the H level, with the corresponding switch conduction of the 3rd, 6,9,12,15 row.
Switch 144 is in the data line 114 of shutoff, owing to become the uncertain high impedance status of voltage, so there is the inconsistent situation of voltage of the voltage and the data line of data-signal.Therefore, will provide the voltage table of the 1st, 2,3 column data lines 114 of data-signal d1 to be shown d1a, d1b, d1c.For the voltage of other data lines, represent as shown in Figure 1.
Operation to the electro-optical device 10 of present embodiment describes below.
As shown in Figure 3, in each horizontal scan period, scan line drive circuit 130 successively exclusively with sweep signal G1, G2, G3 ... G10 is made as the H level.Therefore, a horizontal scan period that at first sweep signal G1 is become the H level describes.
Before sweep signal G1 became the H level, the delegation of pixel data Ds that is listed as the pixel 110 of 1 row 15 row corresponding to 1 row 1 was stored in the latch cicuit 182 of each self-corresponding row.In addition, for this horizontal scan period, if thereby establishing signal Pol becomes the H level and specifies positive polarity to write, then as shown in Figure 5, during among a, public electrode 108 is reduced to voltage ComL from voltage ComH.
On the other hand, during among a, when signal S1, S2, S3 all became the H level, selector switch 186 was chosen in latched data in the latch cicuit 184, and 5 row jointly distribute output.As mentioned above, by latch cicuit 184 latched data, be equivalent to specify the view data of the darkest gray shade scale, in addition, at this,, become the voltage VdH of the positive polarity that is equivalent to the darkest gray shade scale from the voltage of 5 row D/A converters, 188 outputs owing to specified positive polarity to write.
In addition, during among a, when signal S1, S2, S3 side by side became the H level, all switches 144 all became conducting.Therefore, all data lines 114 all are precharged to this voltage VdH.
During among a, when signal S1, S2, S3 became the L level, all data lines 114 all became high impedance status.On the other hand, during among a, because public electrode 108 is reduced to voltage ComL from voltage ComH, so be electrically connected with this public electrode 108 and the data line 114 of high impedance status is subjected to the influence of the change in voltage of this public electrode 108 by capacitor C, voltage begins reduction from voltage VdH.But, because all voltage reductions in the same way of all data lines 114, so precharge effect is not impaired.
In addition, in Fig. 5, show the change in voltage of representational data-signal d1 among data-signal d1～d5 respectively and for the variation of voltage d1a of the 1st row in the 1st, 2,3 column data lines 114 that have been assigned with this data-signal d1.
B during arriving, when public electrode 108 was fixed as voltage ComL, the change in voltage of the data line 114 of high impedance status also stopped.
On the other hand, during among the b, control circuit 20 at first only is made as the H level with signal S1.When only signal S1 became the H level, selector switch 186 selected to belong to the latch cicuit 182 of piece Ba, and exported the 1st row that is latched by these latch cicuits 182, the view data Ds of the 1st, 4,7,10,13 row.
At this owing to specified positive polarity to write, so export such voltage respectively from 5 row D/A converters 188, promptly this voltage be than voltage ComL high one with voltage by the high-order side of the corresponding voltage of the gray-level value of view data Ds appointment.Therefore, signal S1 only become the H level during, data-signal d1 for example, as among the figure ↑ shown in, become such voltage, promptly this voltage is the high-order side voltage than the high voltage corresponding with the gray-level value of the view data Ds appointment that is listed as by 1 row 1 of voltage ComL.Other data-signals d2, d3, d4, d5 also become the high-order side voltage than the high voltage corresponding with the gray-level value of the view data Ds appointment that is listed as by 1 row, 4 row, 1 row, 7 row, 1 row, 10 row, 1 row 13 of voltage ComL respectively.
In addition, during among the b, when only signal S1 becomes the H level, switch 144 conductings of the 1st, 4,7,10,13 row.Therefore, data-signal d1 is provided for the data line 114 of the 1st row, and similarly, data-signal d2, d3, d4, d5 are provided for the data line 114 of the 4th, 7,10,13 row respectively.
During among the b because sweep signal G1 becomes the H level, be in conducting state so be positioned at the TFT116 of the 1st row pixel 110.Therefore, the data-signal d1 that is provided for the 1st column data line 114 is applied to the pixel electrode 118 of 1 row, 1 row.Thus, in the liquid crystal capacitance 120 of 1 row 1 row, the voltage ComL that writes public electrode 108 is poor with the voltage of data-signal d1, promptly with the corresponding voltage of gray-level value of the view data Ds appointment that is listed as by 1 row 1.Similarly, be provided for data-signal d2, d3, d4, the d5 of the 4th, 7,10,13 column data lines 114, also be applied to the pixel electrode 118 of 1 row, 4 row, 1 row, 7 row, 1 row, 10 row, 1 row, 13 row.Thus, in the liquid crystal capacitance 120 of 1 row 4 row, 1 row, 7 row, 1 row, 10 row, 1 row, 13 row, write the corresponding voltage of gray-level value respectively with the view data Ds appointment that is listed as by 1 row, 4 row, 1 row, 7 row, 1 row, 10 row, 1 row 13.
Then, during among the b, after signal S1 was made as the L level, control circuit 20 only was made as the H level with signal S2.In addition, when signal S1 becomes the L level, because the 1st, 4,7,10,13 column data lines 114 become high impedance status because of the shutoff of switch 144, so data-signal d1, d2, d3, d4, d5 before turn-offing are kept.On the other hand, when only signal S2 became the H level, selector switch 186 was selected to belong to the latch cicuit 182 of piece Bb, and exported the view data Ds of the 1st row, the 2nd, 5,8,11,14 row.Therefore, data-signal d1, d2, d3, d4, d5 become the high-order side voltage than the high voltage corresponding with the gray-level value of the view data Ds appointment that is listed as by 1 row, 2 row, 1 row, 5 row, 1 row, 8 row, 1 row, 11 row, 1 row 14 of voltage ComL respectively.
During among the b, when only signal S2 becomes the H level, because the 2nd, 5,8,11,14 row switches 144 become conducting, so data-signal d1, d2, d3, d4, d5 are provided for the 2nd, 5,8,11,14 column data lines 114 respectively.Thus, be applied to the pixel electrode 118 of 1 row, 2 row, 1 row, 5 row, 1 row, 8 row, 1 row, 11 row, 1 row, 14 row, thereby in the liquid crystal capacitance 120 that 1 row, 2 row, 1 row, 5 row, 1 row, 8 row, 1 row, 11 row, 1 row 14 are listed as, write the corresponding voltage of gray-level value respectively with the view data Ds appointment that is listed as by 1 row, 2 row, 1 row, 5 row, 1 row, 8 row, 1 row, 11 row, 1 row 14.
In addition, during among the b, control circuit 20 after signal S2 is made as the L level, only is made as the H level with signal S3.In addition, when signal S2 becomes the L level, because the 2nd, 5,8,11,14 column data lines 114 become high impedance status because of the shutoff of switch 144, so data-signal d1, d2, d3, d4, d5 before turn-offing are kept.On the other hand, when only signal S3 became the H level, selector switch 186 was selected to belong to the latch cicuit 182 of piece Bc, and exported the view data Ds of the 1st row, the 3rd, 6,9,12,15 row.Therefore, data-signal d1, d2, d3, d4, d5 become the high-order side voltage than the high voltage corresponding with the gray-level value of the view data Ds appointment that is listed as by 1 row, 3 row, 1 row, 6 row, 1 row, 9 row, 1 row, 12 row, 1 row 15 of voltage ComL respectively.
During among the b, when only signal S3 becomes the H level, because the 3rd, 6,9,12,15 row switches 144 become conducting, so data-signal d1, d2, d3, d4, d5 are provided for the 3rd, 6,9,12,15 column data lines 114 respectively.Thus, be applied to the pixel electrode 118 of 1 row, 3 row, 1 row, 6 row, 1 row, 9 row, 1 row, 12 row, 1 row, 15 row, thereby in the liquid crystal capacitance 120 that 1 row, 3 row, 1 row, 6 row, 1 row, 9 row, 1 row, 12 row, 1 row 15 are listed as, write the corresponding voltage of gray-level value respectively with the view data Ds appointment that is listed as by 1 row, 3 row, 1 row, 6 row, 1 row, 9 row, 1 row, 12 row, 1 row 15.
According to more than, to be listed as the pixel electrode 118 of 1 row 15 row from 1 row 1, finish and writing by the corresponding positive polarity voltage of the gray shade scale of view data Ds appointment.In addition, write concurrently,, provide the delegation that is listed as the corresponding pixel data Ds of the pixel 110 of 2 row 15 row with 2 row 1, and distribute to the latch cicuit 182 after the view data Ds of output 1 row from above-mentioned feedway for divider 180 with this.Thus, fashionable when finishing to writing of the pixel 110 of delegation, will store latch cicuit 182 into the delegation that 2 row of following 1 are listed as the corresponding pixel data Ds of the pixel 110 of 2 row, 15 row respectively.
In addition, control circuit 20 is made as the L level with signal S3.When signal S3 becomes the L level, because the 3rd, 6,9,12,15 column data lines 114 become high impedance status because of the shutoff of switch 144, so data-signal d1, d2, d3, d4, d5 before turn-offing are kept.
At this moment, the 1st～the 15th column data line 114, what become each row writes voltage, promptly corresponding with gray shade scale voltage.
Then, the horizontal scan period that sweep signal G2 is become the H level describes.
Owing to when sweep signal G1 becomes the H level, specify positive polarity to write, thus sweep signal G2 become the H level during, it is anti-phase to write polarity, thereby specifies negative polarity to write.For this reason, as shown in Figure 5, during c, public electrode 108 rises to voltage ComH from voltage ComL.
During among the c, when signal S1, S2, S3 side by side become the H level, because each column data line 114 all is in high impedance status, so the influence that the voltage of public electrode 108 rises and changed begins similarly to rise from the voltage status corresponding with the gray shade scale of the 1st row pixel.With regard to the voltage d1a of the 1st column data line 114, begin to rise from the voltage corresponding with the gray shade scale of the pixel of 1 row 1 row.
In addition, during among the c, when signal S1, S2, S3 all became the H level, selector switch 186 was selected to be latched circuit 184 latched data, and 5 row jointly distribute output.During this period, because that negative polarity writes is designated, so become the voltage VdL of the negative polarity that is equivalent to the darkest gray shade scale from the voltage of 5 row D/A converters 188 output.Therefore, in all data lines 114, the state that similarly rises from the voltage status corresponding with the gray shade scale of pixel is eliminated, and is precharged to voltage VdL.
In addition, during among the c, when signal S1, S2, S3 become the L level once more, because all data lines 114 all become high impedance status, so be subjected to the influence of the change in voltage of public electrode 108, begin similarly to rise from voltage VdL, still, because the voltage of all data lines 114 rises in an identical manner, so precharge effect can be not impaired.
D extremely, when public electrode 108 was fixed on voltage ComH, the change in voltage of the data line 114 of high impedance status also stopped.On the other hand, during among the d, with during b same, signal S1, S2, S3 become the H level successively exclusively, thereby are listed as the pixel electrode 118 of 2 row, 15 row for 2 row 1, finish and writing by the corresponding reverse voltage of the gray shade scale of view data Ds appointment.
Similarly later on, the pixel 110 that is positioned at odd number the 3rd, 5,7,9 row is carried out positive polarity write, the pixel 110 that is positioned at even number the 4th, 6,8,10 row is carried out negative polarity write.
In addition, in a vertical scanning period of following, what each was gone writes polarity by anti-phase, at length, the pixel 110 that is positioned at odd-numbered line is carried out negative polarity write, and the pixel 110 that is positioned at even number line is carried out positive polarity write.Like this, owing to be converted, so prevented deterioration because of the caused liquid crystal 105 of applying of flip-flop in the polarity that writes of each vertical scanning period for pixel 110.
In the present embodiment, form such structure, promptly during a, c, promptly public electrode 108 from voltage ComL, ComH carries out precharge to data line 114 during another variation.At this, for such advantage that structure produced, with reference to Fig. 7 at be not during a, c, but during the beginning of b, d, promptly public electrode 108 be fixed on voltage ComL, ComH during beginning the problem that data line 114 carries out under the precharge situation is described.
Fig. 7 show during during the beginning of b, d, side by side become the H level and data line 114 carried out in the precharge structure at signal S1, S2, S3, under the situation of the pixel 110 that is conceived to capable 1 row of i and this pixel designated gray shade scale that for example approaches black for a plurality of frames, the pixel electrode 118 of capable 1 row of voltage d1a, the i of the 1st column data line 114 and the change in voltage of public electrode 108.
In this hypothesis, vertical scanning period positive polarity before writes designated and when the pixel electrode 118 of capable 1 row of i write voltage than the high position of the high voltage corresponding with this gray shade scale of voltage ComL, when sweep signal Gi becomes H level and signal S1 and becomes the H level, this pixel electrode is to keep poor with respect to public electrode 108, the voltage that writes and voltage ComL, promptly the mode of the voltage that keeps in liquid crystal capacitance 120 changes (simple for what illustrate, the shutoff of ignoring TFT116 is leaked).
After positive polarity writes and since negative polarity write designated, so public electrode 108 rises to voltage ComH from voltage ComL.Along with this voltage rises, the voltage of the pixel electrode 118 of capable 1 row of i also rises.Therefore, under the bigger situation of the absolute value of the voltage that the liquid crystal capacitance 120 that the capable j by i is listed as keeps, promptly under the maintained situation of voltage corresponding with darker gray shade scale under the normal white mode, the current potential of the pixel electrode 118 of capable 1 row of i can beyond supply voltage Vdd.
Therefore, even thereby because sweep signal Gi becomes H level TFT116 conducting, the leakage of this TFT116 (pixel electrode 118) also can beyond supply voltage, so writing of the voltage corresponding with gray-level value will be insufficient.
In addition, at this, though be that public electrode 108 is risen to the explanation that the situation of voltage ComH is carried out from voltage ComL, but, write designated and public electrode 108 drops to from voltage ComH under the situation of voltage ComL in positive polarity, the voltage of the pixel electrode 118 of capable 1 row of i can drop under the earthing potential Gnd.Therefore, even thereby because sweep signal Gi becomes H level TFT116 conducting, the leakage of TFT116 also can be lower than supply voltage, so similarly, writing of the voltage corresponding with gray-level value will be insufficient.
For head it off, merely:
(1) raising is equivalent to the voltage of the H level of sweep signal.
But, for (1), not only need to make the structure complicated of not shown power circuit, but also need to improve the resistance to pressure of TFT116, and then, can become the main cause that hinders the low consumption electrification because of Towards Higher Voltage.
Therefore, in this example, adopt public electrode 108 from voltage ComL, ComH and during another variation, data line 114 is carried out precharge structure.Thus, as shown in Figure 6, owing to the data line 114 that has prevented high impedance status on business the change in voltage of common electrode 108 exceed the scope of supply voltage from earthing potential Gnd to voltage Vdd, so can carry out writing of the voltage corresponding fully with gray-level value.
In addition, by:
(2) voltage ComL, the ComH of public electrode be in fixing during before the end of b, d, data line 114 is carried out precharge,
Also can obtain same effect.
But, for (2), voltage ComL, the ComH of public electrode fixing during data line 114 is carried out in the precharge structure, can not tackle that pixel increases and the situation that shows high precise image.That is to say, when pixel count increases, number of scanning lines and number of data lines also increase, but, under the fixing condition of a vertical scanning period (1F), when number of scanning lines increases, one horizontal scan period (1H) will shorten, and be accompanied by the increase of number of data lines, the piece number also increases inevitably, so if carry out precharge at voltage ComL, the ComH of public electrode in the fixing limited like this time, like this, then be used to select each piece during be etched, thereby can not guarantee to be used to select each piece during.
As mentioned above, in the present embodiment, owing to during another variation, data line 114 is carried out precharge public electrode 108 from voltage ComL, ComH, so can prevent the current potential beyond supply voltage scope of data line 114, pixel electrode 118.Thus, in the present embodiment, because the TFT116 as the on-off element of pixel 110 is not required higher voltage endurance, in addition, the voltage range of the sweep signal of scan line drive circuit 130 is also narrower, so the voltage ComL by public electrode 108, the switching of ComH can access the effect that the output voltage range of D/A converter 188 obtains narrowing, thereby further simplification of implementation structure.
In addition, in the present embodiment, signal S1, S2, S3 side by side become during the H level, be between the precharge phase of data line 114 from start to end during, be completely contained in public electrode 108 from voltage ComL, ComH during the transition of another variation in, but, also can be: the starting end between this precharge phase or finish among voltage ComL, the ComH that in the end at least one be included in public electrode 108 one during another variation in.That is to say, as shown in Figure 8, also can be: with signal S1, S2, the precharge that S3 side by side becomes the H level begin timing setting be public electrode 108 be fixed on voltage ComL during during the end of b (be fixed on voltage ComH during d), and make signal S1, S2, the precharge stop timing that S3 side by side becomes the L level be included in public electrode 108 from voltage ComH change to voltage ComL during c (from voltage ComL change to voltage ComH during a), as shown in Figure 9, also can: make precharge begin regularly to be included in public electrode 108 from voltage ComH change to a during the voltage ComL (from voltage ComL change to voltage ComH during c) end the time, make the precharge stop timing become public electrode 108 be fixed on voltage ComL during b (be fixed on voltage ComH during d).
In addition, in the present embodiment, sweep signal during become the H level among a or the c, still, also can become the H level at least in signal S1, S1, S3 order and during becoming the H level exclusively.
In an embodiment, though form such structure: between precharge phase, any one sweep signal is made as the H level, and not only also apply pre-charge voltage to data line 114 but also to the pixel electrode 118 corresponding with selecting row, but, also can form such structure: between precharge phase, any one sweep signal is made as the L level, the pixel electrode 118 corresponding with selecting row do not applied pre-charge voltage (for example with reference to Fig. 8).
In the above-described embodiment, will be made as a vertical scanning period (frame) for the period of change that writes polarity of same pixel, still, owing to its reason is in order to prevent liquid crystal capacitance 120 to be applied flip-flop, so, anti-phase for it, also can be made as two or more frame periods.
And then, in an embodiment, though be set to apply the normal white mode of display white under the state at no-voltage,, also can be set to apply the normal black pattern that shows black under the state at no-voltage.
In addition, also can use R (red), G (green) and B (indigo plant) 3 pixels to constitute a bit, show and carry out colour.
And then, also can not sequentially to select each piece, do not carry out blocking, but sequentially select each data line 114, also can after precharge, select all data lines 114 together.
In addition, in the above-described embodiment, divide, still, also can be divided into 4 or the piece more than 4 according to the columns of data line 114 for 3 piece Ba, Bb, Bc.
In addition, in the present embodiment, pre-charge voltage is set to be equivalent to the voltage of the darkest gray shade scale, still, also can be the voltage that is equivalent to other gray shade scales, also can be set to voltage ComH, the ComL of public electrode 108.
In addition,, also can be set to be equivalent to the voltage of identical gray shade scale, also can make its difference for positive polarity and negative polarity.And then, for positive polarity, negative polarity, also can be set to voltage Vc identical, for example amplitude center.
Below, describe for some electronic equipment of the electro-optical device 10 with the foregoing description as display device.
Figure 10 is the skeleton view of structure that the mobile phone 1200 of the electro-optical device 10 that has used embodiment is shown.
As shown in the drawing, mobile phone 1200 except a plurality of action buttons 1202, also comprises receiving mouth 1204, mouth piece 1206 and above-mentioned electro-optical device 10.In addition, in electro-optical device 10, for the inscape beyond the viewing area 100, owing to be built in the phone device, so do not demonstrate as outward appearance.
Regarding to the electro-optical device 10 that uses above-mentioned electro-optical device the foregoing description down describes as the three-plate type projector of light valve.Figure 11 is the planimetric map that its structure is shown.
In this projector 2100, the light that is used to incide light valve is configured in inner 3 catoptrons 2106 and two dichronic mirrors 2108 and is separated into R (red), G (green), B (indigo plant) three primary colors, and is directed into light valve 100R, 100G and the 100B corresponding with each primary colors respectively.In addition, B coloured light compares with other R coloured light, G coloured light etc., because light path is longer, so in order to prevent its loss, by relay lens system 2121 channeling conducts that are made of incident lens 2122, relay lens 2123 and exit lens 2124.
At this, the structure of light valve 100R, 100G and 100B is identical with the viewing area 100 of the electro-optical device 10 of the foregoing description, and respectively by being driven with R, G, the B corresponding view data of all kinds that provides from outside epigyny device (diagram is omitted).
Light after light valve 100R, 100G, 100B modulate respectively incides colour splitting prism 2112 from three directions.In addition, in this colour splitting prism 2112, R coloured light and B coloured light are with 90 degree refractions, and G coloured light then directly advances.Therefore, after image of all kinds is synthesized, owing to carry out the positive enlarging projection by lens unit 2114, so coloured image is shown on the screen 2120.
In addition, the picture that sees through with respect to light valve 100R, 100B is projected after by colour splitting prism 2112 reflections, because the picture that sees through of light valve 100G then directly is projected, so the horizontal scan direction of the horizontal scan direction of light valve 100R, 100B and light valve 100G is reverse, thereby become the structure that shows the anti-phase picture in the left and right sides.
As the electronic equipment of using electro-optical device 10, except mobile phone shown in Figure 10, projector shown in Figure 11, can also list digital camera, laptop computer, LCD TV, the type of finding a view (or monitor direct viewing type) video recorder, automobile navigation apparatus, pager, electronic notebook, electronic calculator, word processor, workstation, videophone, POS terminal, possess the equipment of touch panel etc.In addition, as the display device of these various electronic equipments, obviously can use above-mentioned electro-optical device 10.In addition, in any one electronic equipment, simplification that all can implementation structure.
Claims (7)
1. electro-optical device, has pixel, this pixel comprises and being provided with accordingly with intersecting of multi-strip scanning line and many data lines and for the independent pixel electrode of each pixel, the public electrode relative with pixel electrodes and between above-mentioned data line and the pixel electrodes and above-mentioned sweep trace is being applied the on-off element that becomes conducting state when selecting voltage, wherein, for above-mentioned public electrode, with the predetermined cycle switch and the high-order voltage that applies assigned voltage with compare relatively low low level voltage with above-mentioned high-order voltage, it is characterized in that possessing:
Scan line drive circuit, it is with above-mentioned multi-strip scanning line of select progressively of regulation, and selected sweep trace applied above-mentioned selection voltage; And
Data line drive circuit, it is during above-mentioned sweep trace is selecteed, promptly the voltage that above-mentioned public electrode is applied be retained as above-mentioned high-order voltage or above-mentioned low level voltage during, provide the data-signal corresponding to above-mentioned data line with the gray shade scale of pixel, and comprise the side of above-mentioned public electrode from above-mentioned high-order voltage and above-mentioned low level voltage change to the opposing party during during in, above-mentioned many data lines are precharged to the current potential of regulation.
2. electro-optical device according to claim 1 is characterized in that: above-mentioned precharge from the outset when finishing during, be included in the side of above-mentioned public electrode from above-mentioned high-order voltage or above-mentioned low level voltage change to the opposing party during in.
3. electro-optical device according to claim 1 is characterized in that:
During above-mentioned precharge beginning, be included in above-mentioned public electrode from above-mentioned high-order change in voltage to above-mentioned low level voltage during in, and
During above-mentioned precharge end, be included in above-mentioned public electrode be fixed on above-mentioned low level voltage during in; Perhaps
During above-mentioned precharge beginning, be included in above-mentioned public electrode from above-mentioned low level change in voltage to above-mentioned high-order voltage during in, and
During above-mentioned precharge end, be included in above-mentioned public electrode be fixed on above-mentioned high-order voltage during in.
4. electro-optical device according to claim 1 is characterized in that:
During above-mentioned precharge beginning, be included in above-mentioned public electrode be fixed on a side in above-mentioned high-order voltage or the above-mentioned low level voltage during in;
During above-mentioned precharge end, be included in the side of above-mentioned public electrode from above-mentioned high-order voltage or above-mentioned low level voltage change to the opposing party during in.
5. electro-optical device according to claim 1 is characterized in that: above-mentioned precharge from the outset when finishing during, be included in to above-mentioned sweep trace apply above-mentioned selection voltage during in.
6. method of driving electro-optical device, this electro-optical device has pixel, this pixel comprises and being provided with accordingly with intersecting of multi-strip scanning line and many data lines and for the independent pixel electrode of each pixel, the public electrode relative with pixel electrodes, and between above-mentioned data line and the pixel electrodes and above-mentioned sweep trace is being applied the on-off element that becomes conducting state when selecting voltage, wherein, for above-mentioned public electrode, with the predetermined cycle switch and the high-order voltage that applies assigned voltage with compare relatively low low level voltage with above-mentioned high-order voltage, it is characterized in that this method comprises:
With the above-mentioned multi-strip scanning line of select progressively of regulation, and selected sweep trace applied above-mentioned selection voltage; And
During above-mentioned sweep trace is selecteed, promptly the voltage that above-mentioned public electrode is applied be retained as above-mentioned high-order voltage or above-mentioned low level voltage during, provide the data-signal corresponding to above-mentioned data line with the gray shade scale of pixel, and comprise the side of above-mentioned public electrode from above-mentioned high-order voltage and above-mentioned low level voltage change to the opposing party during during in, above-mentioned many data lines are precharged to the current potential of regulation.
7. an electronic equipment is characterized in that: comprise according to any described electro-optical device in the claim 1 to 5.
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| JP289665/2005 | 2005-10-03 | ||
| JP2005289665 | 2005-10-03 | ||
| JP2006167032A JP4797823B2 (en) | 2005-10-03 | 2006-06-16 | Electro-optical device, driving method of electro-optical device, and electronic apparatus |
| JP167032/2006 | 2006-06-16 |
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| CN1945684A CN1945684A (en) | 2007-04-11 |
| CN100487785C true CN100487785C (en) | 2009-05-13 |
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| US (1) | US8497831B2 (en) |
| JP (1) | JP4797823B2 (en) |
| KR (1) | KR100813453B1 (en) |
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Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE602008001328D1 (en) | 2007-05-14 | 2010-07-08 | Sumitomo Rubber Ind | All-terrain motorcycle tire |
| TWI378433B (en) * | 2007-08-16 | 2012-12-01 | Tpo Displays Corp | Control method and electronic system utilizing the same |
| JP5024110B2 (en) * | 2008-02-22 | 2012-09-12 | セイコーエプソン株式会社 | Electro-optical device and electronic apparatus |
| JP4631917B2 (en) * | 2008-02-29 | 2011-02-16 | エプソンイメージングデバイス株式会社 | Electro-optical device, driving method, and electronic apparatus |
| KR101508719B1 (en) * | 2008-10-06 | 2015-04-03 | 삼성디스플레이 주식회사 | Driving unit and display device having the same |
| JP5493547B2 (en) * | 2009-07-29 | 2014-05-14 | 株式会社Ｊｖｃケンウッド | Liquid crystal display device and driving method of liquid crystal display device |
| CN102110420B (en) * | 2009-12-24 | 2013-07-10 | 北京京东方光电科技有限公司 | Array substrate and shift register arranged thereon |
| US9721514B2 (en) * | 2010-07-26 | 2017-08-01 | Himax Display, Inc. | Method for driving reflective LCD panel |
| JP5552954B2 (en) * | 2010-08-11 | 2014-07-16 | セイコーエプソン株式会社 | Electro-optical device and electronic apparatus |
| TWI417834B (en) * | 2010-12-23 | 2013-12-01 | Au Optronics Corp | Display panel |
| KR20120121715A (en) * | 2011-04-27 | 2012-11-06 | 삼성디스플레이 주식회사 | Display apparatus |
| CN102208177B (en) * | 2011-06-24 | 2013-04-24 | 深圳市华星光电技术有限公司 | Liquid-crystal display device and signal driving method thereof |
| US20130021315A1 (en) * | 2011-07-20 | 2013-01-24 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Lcd device and signal driving method thereof |
| CN102269904B (en) * | 2011-07-20 | 2013-09-18 | 深圳市华星光电技术有限公司 | Liquid crystal display device and signal driving method thereof |
| CN102314010B (en) * | 2011-09-05 | 2014-10-29 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and voltage control method thereof |
| CN103165059B (en) * | 2011-12-09 | 2016-01-20 | 群康科技(深圳)有限公司 | Display drive method, driver module and display device |
| JP2017167426A (en) * | 2016-03-17 | 2017-09-21 | セイコーエプソン株式会社 | Electronic optical device, and electronic instrument |
| JP2018017803A (en) * | 2016-07-26 | 2018-02-01 | セイコーエプソン株式会社 | Electro-optic device, electronic apparatus, and method for driving electro-optic device |
| CN106019735B (en) * | 2016-08-09 | 2018-11-23 | 京东方科技集团股份有限公司 | A kind of display panel, display device and its control method |
| US11443707B2 (en) * | 2018-01-12 | 2022-09-13 | Sony Semiconductor Solutions Corporation | Liquid crystal display device, method for driving liquid crystal display device, and electronic apparatus |
| CN109215563B (en) * | 2018-11-26 | 2022-03-01 | 京东方科技集团股份有限公司 | Data writing control method, unit, pixel driving circuit and display device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0623911A1 (en) * | 1993-04-28 | 1994-11-09 | Canon Kabushiki Kaisha | Method for driving liquid crystal display device |
| CN1434432A (en) * | 2002-01-16 | 2003-08-06 | 株式会社日立制作所 | LCD equipment having improved precharge circuit and method of driving same |
| CN1475985A (en) * | 2002-06-28 | 2004-02-18 | 精工爱普生株式会社 | Electrooptic apparatus driving method, electrooptic apparatus and electronic apparatus |
| CN1576973A (en) * | 2003-07-22 | 2005-02-09 | 精工爱普生株式会社 | Photoelectrical apparatus, driving method of photoelectric apparatus and electronic equipment |
| CN1617207A (en) * | 2003-11-13 | 2005-05-18 | 精工爱普生株式会社 | Method of driving electro-optical device, electro-optical device, and electronic apparatus |
| CN1641733A (en) * | 2004-01-15 | 2005-07-20 | 精工爱普生株式会社 | Electro-optical device, circuit for driving electro-optical device, method of driving electro-optical device, and electronic apparatus |
| CN1648983A (en) * | 2004-01-28 | 2005-08-03 | 精工爱普生株式会社 | Electro-optical device, its driving circuit, driving method and electronic apparatus |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6249399A (en) | 1985-08-29 | 1987-03-04 | キヤノン株式会社 | Driving of display panel |
| JPH06149180A (en) * | 1992-11-02 | 1994-05-27 | Fujitsu Ltd | Method for driving liquid cystal display device |
| JP2002311926A (en) * | 2001-02-07 | 2002-10-25 | Toshiba Corp | Driving method for planar display device |
| JP3791355B2 (en) * | 2001-06-04 | 2006-06-28 | セイコーエプソン株式会社 | Driving circuit and driving method |
| JP4225777B2 (en) * | 2002-02-08 | 2009-02-18 | シャープ株式会社 | Display device, driving circuit and driving method thereof |
| JP2003323160A (en) * | 2002-04-30 | 2003-11-14 | Sony Corp | Liquid crystal display and driving method of the same, and portable terminal |
| JP4124092B2 (en) * | 2003-10-16 | 2008-07-23 | 沖電気工業株式会社 | Driving circuit for liquid crystal display device |
-
2006
- 2006-06-16 JP JP2006167032A patent/JP4797823B2/en not_active Expired - Fee Related
- 2006-09-15 TW TW095134331A patent/TWI351664B/en not_active IP Right Cessation
- 2006-09-25 US US11/534,948 patent/US8497831B2/en active Active
- 2006-09-29 KR KR1020060095691A patent/KR100813453B1/en active IP Right Grant
- 2006-10-08 CN CNB2006101418706A patent/CN100487785C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0623911A1 (en) * | 1993-04-28 | 1994-11-09 | Canon Kabushiki Kaisha | Method for driving liquid crystal display device |
| CN1434432A (en) * | 2002-01-16 | 2003-08-06 | 株式会社日立制作所 | LCD equipment having improved precharge circuit and method of driving same |
| CN1475985A (en) * | 2002-06-28 | 2004-02-18 | 精工爱普生株式会社 | Electrooptic apparatus driving method, electrooptic apparatus and electronic apparatus |
| CN1576973A (en) * | 2003-07-22 | 2005-02-09 | 精工爱普生株式会社 | Photoelectrical apparatus, driving method of photoelectric apparatus and electronic equipment |
| CN1617207A (en) * | 2003-11-13 | 2005-05-18 | 精工爱普生株式会社 | Method of driving electro-optical device, electro-optical device, and electronic apparatus |
| CN1641733A (en) * | 2004-01-15 | 2005-07-20 | 精工爱普生株式会社 | Electro-optical device, circuit for driving electro-optical device, method of driving electro-optical device, and electronic apparatus |
| CN1648983A (en) * | 2004-01-28 | 2005-08-03 | 精工爱普生株式会社 | Electro-optical device, its driving circuit, driving method and electronic apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4797823B2 (en) | 2011-10-19 |
| KR100813453B1 (en) | 2008-03-13 |
| US20070075960A1 (en) | 2007-04-05 |
| CN1945684A (en) | 2007-04-11 |
| US8497831B2 (en) | 2013-07-30 |
| JP2007128033A (en) | 2007-05-24 |
| TWI351664B (en) | 2011-11-01 |
| KR20070037684A (en) | 2007-04-06 |
| TW200727233A (en) | 2007-07-16 |
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